XF 1.2How to Batch Update(Delete) About field?

Active member

In the batch update users there is an option to Remove avatars, Remove signatures and Remove home pages. However, there is no option to remove the "About" info even though a lot of spammers use that for spamming purposes. Is there something I'm missing or is the only way to update that field is via database?

If so, what would be the query to remove all about field info from a usergroupX where posts < 1 ?